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LM363H-500 Datasheet(PDF) 8 Page - National Semiconductor (TI) |
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LM363H-500 Datasheet(HTML) 8 Page - National Semiconductor (TI) |
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8 / 22 page  Simplified Schematic (pin numbers in parentheses are for 8-pin package) TLH5609 – 7 Theory of Operation Referring to the Simplified Schematic it can be seen that the input voltage is applied across the bases of Q1 and Q2 and appears between their emitters If RE1-2 is the resist- ance across these emitters a differential current equal to VIN RE1-2 flows from Q1’s emitter to Q2’s The second stage amplifier shown maintains Q1 and Q2 at equal collec- tor currents by negative feedback to Q4 The emitter cur- rents of Q3 and Q4 must therefore be unbalanced by an amount equal to the current flow across RE1-2 Defining RE3-4eR5aR6 the differential voltage across the emitters of Q4 to Q3 is equal to VIN RE 1-2 c RE3-4 This voltage divided by the attenuation factor R4 R3aR4 e R2 R1aR2 is equal to the output-to-reference voltage Hence the over- all gain is given by Ge VOUT VIN e R3aR4 R4 c RE3-4 RE1-2 8 |
Número de pieza similar - LM363H-500 |
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Descripción similar - LM363H-500 |
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